DW55 Smart Watch 1.75 inch Bluetooth Call Pressure Monitor Smart Watch Bracelet Functions: Rotating button, game, drinking water reminder, blood oxygen, exercise mode (outdoor running, walking, mountaineering, indoor running), heart rate, message reminder, calendar, Facebook, watchapp, Twitter, calculator, call record SMS push, Bluetooth music, sleep, monitoring, step counting, remote photo taking, alarm clock, setting, Siri, looking for mobile phone, dialing, address book。 Bracelet size（mm）：45*38.3*12.8mm Chipset :MTK-2502D APP :LEFUN Compatible System:Android 5.0 and above; IOS9.0 and above FLASH memory:32MB+32MB Screen size:1.75 INCH Resolution:IPS 320*385 Touch-type:Full touch-screen BT:BT 3.0/4.0 G-Sensor :SC7A20 Type:Lithium polymer battery Capacity:3.7V/180mAh Charging Method：Magnetic seat charging APP Language:English, French, Arabic, Persian, Spanish, Russian, Vietnamese, Thai, Czech, Turkish, Polish, Portuguese and Greek. Waterproof Level:Life waterproof Charging time:1.5H Life tim:7 Days Wristband size:Total length 226.6mm, width 21mm Appearance material:Zinc alloy Package list: 1x Smart watch 1xMagnetic charger 1XManual